Today at lunch my car decides to just die. Cruising to get a parking spot and the car just turns off. No stumbling, no low rpm, no bucking, was at 1700rpm and just BLAHHHH. I had just done a spark plug change on Sat. Car was running fine. Car wants to fire, but doesn't. Maybe bad wires, nope...replaced with another set= nothing. Replaced battery with a brand new one= nothing. Removed alternator and went to Autozone, nothing wrong with alternator= still nothing. Went and got a fuel pressure gauge, 60psi= still nothing. Check grounds behind head, tight as hell= nothing. Tow the sucker home and run a scan= no codes......... What else could I check?????????